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    <title>Document</title>
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    <script>
    // filter 筛选数组
    var arr = [12, 22, 5, 33];
    var newArr = arr.filter(function(value, index) {
        // return value >= 20;
        return value % 2 === 0;
    })
    console.log(newArr);
    </script>
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